Disposable vaporizers contain concentrated cannabis oil that is heated by an attached battery and inhaled. These products come charged and ready to go and are not designed to be reused refilled or recharged. These products are often very potent and are designed to be consumed in 2-3 second puffs. In accordance with the 935 CMR 500.105 (5) and 935 CMR 501.105 (5): PERTAINING TO ALL VAPORIZER CARTRIDGES: This product has been tested for contaminants, including Vitamin E Acetate with no adverse findings. WARNING: Vaporizer Products may contain ingredients harmful to health when inhaled. Certificate of Analysis available upon request.